CN102778743B - Image capturing lens assembly - Google Patents
Image capturing lens assembly Download PDFInfo
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- CN102778743B CN102778743B CN201110224310.8A CN201110224310A CN102778743B CN 102778743 B CN102778743 B CN 102778743B CN 201110224310 A CN201110224310 A CN 201110224310A CN 102778743 B CN102778743 B CN 102778743B
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- 239000000463 material Substances 0.000 claims description 73
- 230000003287 optical effect Effects 0.000 claims description 67
- 239000004568 cement Substances 0.000 claims description 60
- 238000003384 imaging method Methods 0.000 claims description 30
- 239000011521 glass Substances 0.000 claims description 14
- 230000004075 alteration Effects 0.000 abstract description 35
- 238000001914 filtration Methods 0.000 description 19
- 230000000007 visual effect Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 9
- 201000009310 astigmatism Diseases 0.000 description 4
- 238000012937 correction Methods 0.000 description 4
- 206010070834 Sensitisation Diseases 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 210000001747 pupil Anatomy 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000008313 sensitization Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
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Abstract
The present invention relates to an image capturing lens assembly, in order from an object side to an image side comprising five lens elements with refractive power: a first lens element with negative refractive power having a convex object-side surface and a concave image-side surface; a second lens element with positive refractive power having a convex image-side surface; a third lens element with positive refractive power having a convex object-side surface; a fourth lens element with negative refractive power having a convex object-side surface and a concave image-side surface; and a fifth lens element with positive refractive power. By the arrangement of the lens assembly, a sufficient field of view of the system can be provided, and the aberration of the system can be corrected to obtain a good image quality.
Description
Technical field
The present invention is about a kind of image pick-up lens group; Particularly about a kind of miniaturization image pick-up lens group that is applied to electronic product.
Background technology
In recent years, the range of application of pick-up lens was more and more extensive, particularly in industries such as mobile phone camera, computer network camera, automobile-used camera lens, safe imaging monitoring and electronic entertainment.Generally speaking, the photo-sensitive cell of pick-up lens is nothing more than being sensitization coupling element (Charge Coupled Device, or complementary matal-oxide semiconductor element (Complementary Metal-Oxide Semiconductor Sensor CCD), CMOS Sensor) two kinds, and progressing greatly due to process technique, the elemental area of photo-sensitive cell is dwindled, leading pick-up lens gradually toward high pixel and the development of miniaturization field, meanwhile, on market, the requirement for image quality also increases day by day.
Generally be applied to the pick-up lens of the aspects such as mobile phone camera, computer network camera, automobile-used camera lens, safe imaging monitoring and electronic entertainment, because considering the image characteristics that needs single acquisition extensive area, the required field angle of its camera lens is larger.The pick-up lens with great visual angle of commonly seeing, adopt pre-group mirror group is the configuration mode that negative refracting power, rear group's mirror group are positive refracting power more, form so-called anti-photography type (Inverse Telephoto) structure, obtain by this characteristic of Wide-angle, as United States Patent (USP) the 7th, 446, shown in No. 955, the four-piece type lens arrangement of the negative refracting power of pre-group mirror group tool, the positive refracting power of rear group's mirror group tool is adopted by system, lens configuration form even so can obtain larger field angle, but because rear group only configures a slice lens, be difficult to system aberration to do good correction.Moreover, automobile is equipped with the universal of reverse image device in recent years, the wide viewing angle optical lens group that is equipped with high-res has become a kind of trend, is therefore badly in need of one and possesses and have Wide-angle and high image quality, and be unlikely to the imagery optical lens set that makes camera lens total length long.
Summary of the invention
The invention provides a kind of image pick-up lens group, extremely sequentially comprised the lens of five tool refracting powers by thing side as side: the first lens of the negative refracting power of a tool, its thing side is convex surface and is concave surface as side; The second lens of the positive refracting power of one tool, it is convex surface as side; The 3rd lens of the positive refracting power of one tool, its thing side is convex surface; The 4th lens of the negative refracting power of one tool, its thing side is convex surface and is concave surface as side; And the 5th lens of the positive refracting power of a tool; Wherein, the whole focal length of this image pick-up lens group is f, the focal length of this first lens is f1, the focal length of these the second lens is f2, the focal length of the 3rd lens is f3, distance between these second lens and the 3rd lens is T23, is to meet following relationship :-1.45 < f/f1 <-0.55; 0.15 < f/f2 < 1.0; 0.5 < f/f3 < 1.5; And 0 < (T23/f) * 10 < 5.0.
On the other hand, the invention provides a kind of image pick-up lens group, extremely sequentially comprised as side by thing side: a pre-group mirror group, an aperture and one rear group of mirror group; This pre-group mirror group, is extremely sequentially comprised as side by thing side: the first lens of the negative refracting power of a tool, and its thing side is convex surface and is concave surface as side; And the second lens of the positive refracting power of a tool, it is convex surface as side; This rear group's mirror group, is extremely sequentially comprised as side by thing side: the 3rd lens of the positive refracting power of a tool, and its thing side is convex surface; The 4th lens of the negative refracting power of one tool, its thing side is convex surface and is concave surface as side, and in its Ji Xiang side, thing side, at least one surface is aspheric surface, and in its Ji Xiang side, thing side, at least one surface is provided with at least one point of inflexion, and its material is plastic cement; And the 5th lens of the positive refracting power of a tool, in its Ji Xiang side, thing side, at least one surface is aspheric surface, and its material is plastic cement; Wherein, the whole focal length of this image pick-up lens group is f, the focal length of these the second lens is f2, the focal length of the 3rd lens is f3, the radius-of-curvature of the thing side of the 3rd lens is R5, the radius-of-curvature of the thing side of the 4th lens is R7, is to meet following relationship: 0.15 < f/f2 < 1.0; 0.5 < f/f3 < 1.5; And 0 < R5/R7 < 1.2.
On the one hand, the invention provides a kind of image pick-up lens group again, extremely sequentially comprised the lens of five tool refracting powers by thing side as side: the first lens of the negative refracting power of a tool, its thing side is convex surface and is concave surface as side; The second lens of the positive refracting power of one tool, it is convex surface as side; The 3rd lens of the positive refracting power of one tool, its thing side is convex surface; The 4th lens of the negative refracting power of one tool, its thing side is convex surface and is concave surface as side, and in its Ji Xiang side, thing side, at least one surface is aspheric surface, and in its Ji Xiang side, thing side, at least one surface is provided with at least one point of inflexion, and its material is plastic cement; And the 5th lens of the positive refracting power of a tool, in its Ji Xiang side, thing side, at least one surface is aspheric surface, and its material is plastic cement; Wherein, the whole focal length of this image pick-up lens group is that the focal length of these the second lens of f is f2, the focal length of the 3rd lens is f3, and the focal length of this first lens is f1, is to meet following relationship: 0.15 < f/f2 < 1.0; 0.5 < f/f3 < 1.5; And 0 < | f/f1|-f/f3 < 0.8.
By above-mentioned mirror group configuration mode, can provide the field angle of system abundance, and update the system aberration is to obtain good image quality.
In image pick-up lens group of the present invention, this first lens tool is born refracting power, is the field angle that is conducive to expand system.In the time of the positive refracting power of this second lens tool, these second lens provide system main refracting power, can shorten the optics total length of system.When the positive refracting power of the 3rd lens tool, contribute to shorten system total length.When the negative refracting power of the 4th lens tool, can provide components of system as directed to bear refracting power, effectively the higher order aberratons of update the system.When the positive refracting power of the 5th lens tool, can effectively distribute the refracting power of the 3rd lens, contribute to reduce the susceptibility of system.
In image pick-up lens group of the present invention, when the thing side of this first lens is convex surface and while being concave surface as side, contribute to expand the field angle of system, and the refraction for incident ray comparatively relaxes, can avoid aberration excessively to increase, therefore be conducive to obtain good balance in expanding system field angle and revising aberration.When these the second lens be convex surface as side time, can be beneficial to the astigmatism of update the system.In the time that the thing side of the 3rd lens is convex surface, contribute to astigmatism and the higher order aberratons of update the system.When the thing side of the 4th lens is convex surface and while being concave surface as side, can contribute to astigmatism and the higher order aberratons of update the system.
Brief description of the drawings
Figure 1A is the optical system schematic diagram of first embodiment of the invention.
Figure 1B is the aberration curve figure of first embodiment of the invention.
Fig. 2 A is the optical system schematic diagram of second embodiment of the invention.
Fig. 2 B is the aberration curve figure of second embodiment of the invention.
Fig. 3 A is the optical system schematic diagram of third embodiment of the invention.
Fig. 3 B is the aberration curve figure of third embodiment of the invention.
Fig. 4 A is the optical system schematic diagram of fourth embodiment of the invention.
Fig. 4 B is the aberration curve figure of fourth embodiment of the invention.
Fig. 5 A is the optical system schematic diagram of fifth embodiment of the invention.
Fig. 5 B is the aberration curve figure of fifth embodiment of the invention.
Fig. 6 A is the optical system schematic diagram of sixth embodiment of the invention.
Fig. 6 B is the aberration curve figure of sixth embodiment of the invention.
Fig. 7 A is the optical system schematic diagram of seventh embodiment of the invention.
Fig. 7 B is the aberration curve figure of seventh embodiment of the invention.
Fig. 8 A is the optical system schematic diagram of eighth embodiment of the invention.
Fig. 8 B is the aberration curve figure of eighth embodiment of the invention.
Fig. 9 A is the optical system schematic diagram of ninth embodiment of the invention.
Fig. 9 B is the aberration curve figure of ninth embodiment of the invention.
Main element symbol description:
Aperture 100,200,300,400,500,600,700,800,900
First lens 110,210,310,410,510,610,710,810,910
Thing side 111,211,311,411,511,611,711,811,911
Picture side 112,212,312,412,512,612,712,812,912
The second lens 120,220,320,420,520,620,720,820,920
Thing side 121,221,321,421,521,621,721,821,921
Picture side 122,222,322,422,522,622,722,822,922
The 3rd lens 130,230,330,430,530,630,730,830,930
Thing side 131,231,331,431,531,631,731,831,931
Picture side 132,232,332,432,532,632,732,832,932
The 4th lens 140,240,340,440,540,640,740,840,940
Thing side 141,241,341,441,541,641,741,841,941
Picture side 142,242,342,442,542,642,742,842,942
The 5th lens 150,250,350,450,550,650,750,850,950
Thing side 151,251,351,451,551,651,751,851,951
Picture side 152,252,352,452,552,652,752,852,952
Infrared ray filtering optical filter 160,260,360,460,560,660,760,860,960
Image Sensor 170,270,370,470,570,670,770,870,970
Imaging surface 171,271,371,471,571,671,771,871,971
The focal length of overall image pick-up lens group is f
The focal length of first lens is f1
The focal length of the second lens is f2
The focal length of the 3rd lens is f3
The abbe number of the 3rd lens is V3
The abbe number of the 4th lens is V4
The thickness of first lens on optical axis is CT1
The thickness of the 5th lens on optical axis is CT5
The radius-of-curvature of the thing side of the 3rd lens is R5
The radius-of-curvature of the thing side of the 4th lens is R7
The radius-of-curvature as side of the 4th lens is R8
Distance between the second lens and the 3rd lens is T23
To imaging surface, the distance on optical axis is SL to aperture
To imaging surface, the distance on optical axis is TTL in the thing side of first lens
Embodiment
The invention provides a kind of image pick-up lens group, extremely sequentially comprised the lens of five tool refracting powers by thing side as side: the first lens of the negative refracting power of a tool, its thing side is convex surface and is concave surface as side; The second lens of the positive refracting power of one tool, it is convex surface as side; The 3rd lens of the positive refracting power of one tool, its thing side is convex surface; The 4th lens of the negative refracting power of one tool, its thing side is convex surface and is concave surface as side; And the 5th lens of the positive refracting power of a tool; Wherein, the whole focal length of this image pick-up lens group is f, the focal length of this first lens is f1, the focal length of these the second lens is f2, the focal length of the 3rd lens is f3, distance between these second lens and the 3rd lens is T23, is to meet following relationship :-1.45 < f/f1 <-0.55; 0.15 < f/f2 < 1.0; 0.5 < f/f3 < 1.5; And 0 < (T23/f) * 10 < 5.0.
When aforementioned image pick-up lens group meets following relationship:, the refracting power of this first lens is comparatively suitable when-1.45 the < f/f1 <-0.55, is avoided susceptibility too high; Preferably, be to meet following relationship :-1.25 < f/f1 <-0.70; More preferably :-1.15≤f/f1≤-0.82.
When aforementioned image pick-up lens group meets following relationship: when 0.15 < f/f2 < 1.0, can effectively control this second lens refracting power and be unlikely excessive, and contribute to reduce the generation of aberration, and reduce the susceptibility of system; Preferably, be to meet following relationship: 0.30≤f/f2≤0.74.
When aforementioned image pick-up lens group meets following relationship: when 0.5 < f/f3 < 1.5, by controlling the refracting power of the 3rd lens, can assist update the system aberration, and and then improve image quality; Preferably, be to meet following relationship: 0.57≤f/f3≤1.19.
When aforementioned image pick-up lens group meets following relationship: when 0 < (T23/f) * 10 < 5.0, can make mirror spacing in mirror group be unlikely to excessive or too small, except being conducive to the assembled configuration of eyeglass, more contribute to the utilization in mirror group space, to promote the miniaturization of camera lens; Preferably, be to meet following relationship: 0 < (T23/f) * 10 < 1.5; More preferably, be to meet following relationship: 0 < (T23/f) * 10 < 0.5; Again more preferably, 0.08≤(T23/f) * 10≤0.13.
In the aforementioned image pick-up lens group of the present invention, preferably, when at least one surface is provided with at least one point of inflexion in the Ji Xiang side, thing side of the 4th lens, can effectively suppresses from the light of axle visual field and be incident in the angle on photo-sensitive cell, and the further aberration of modified off-axis visual field.
In the aforementioned image pick-up lens group of the present invention, this image pick-up lens group further arranges an aperture, the distance of this aperture to one imaging surface on optical axis is SL, the thing side of this first lens to the distance of this imaging surface on optical axis is TTL, preferably, when aforementioned image pick-up lens group meets following relationship: when 0.5 < SL/TTL < 0.85, can make the outgoing pupil (Exit Pupil) of this image acquisition lens group away from imaging surface, therefore, light will be incident on photo-sensitive cell in the mode that approaches vertical incidence, this is the heart far away (Telecentric) characteristic of picture side, heart characteristic far away is very important for the photoperceptivity of solid-state electronic photo-sensitive cell, can make the sensitization susceptibility of sense electronics optical element improve, minimizing system produces the possibility at dark angle, preferably, be to meet following relationship: 0.64≤SL/TTL≤0.71.
In the aforementioned image pick-up lens group of the present invention, the radius-of-curvature of the thing side of the 3rd lens is R5, the radius-of-curvature of the thing side of the 4th lens is R7, preferably, when aforementioned image pick-up lens group meets following relationship: when 0 < R5/R7 < 1.2, the positive refracting power of the 3rd lens can be strengthened in the convex surface thing side of the 3rd lens, and the convex surface thing side of the 4th lens can coordinate the negative refracting power of the 4th lens with correction aberration; Preferably, be to meet following relationship: 0.06≤R5/R7≤0.75.
In the aforementioned image pick-up lens group of the present invention, the radius-of-curvature of the thing side of the 4th lens is R7, the radius-of-curvature as side of the 4th lens is R8, preferably, when aforementioned image pick-up lens group meets following relationship: when the < 3.0 of 1.0 < (R7+R8)/(R7-R8), can guarantee that the 4th lens are crescent lens, and be conducive to the astigmatism that update the system produces; Preferably, be to meet following relationship: 111≤(R7+R8)/(R7-R8)≤1.94.
In the aforementioned image pick-up lens group of the present invention, the thickness of this first lens on optical axis is CT1, the thickness of the 5th lens on optical axis is CT5, preferably, when aforementioned image pick-up lens group meets following relationship: when 0.7 < CT1/CT5 < 1.7, the thickness of this first lens and the 5th lens is comparatively applicable, is conducive to, in promoting image quality, maintain lightening characteristic; Preferably, be to meet following relationship: 0.86≤CT1/CT5≤1.55.
In the aforementioned image pick-up lens group of the present invention, the abbe number of the 3rd lens is V3, the abbe number of the 4th lens is V4, preferably, when aforementioned image pick-up lens group meets following relationship: when 26 < V3-V4 < 45, be conducive to the aberration of update the system; Preferably, be to meet following relationship: 32.1≤V3-V4≤36.5.
In the aforementioned image pick-up lens group of the present invention, the whole focal length of this image pick-up lens group is f, the focal length of this first lens is f1, the focal length of the 3rd lens is f3, preferably, when aforementioned image pick-up lens group meets following relationship: 0 < | when f/f1|-f/f3 < 0.8, can make, under the long situation of system total length, to provide good field angle being unlikely to; Preferably, be to meet following relationship: 0.24≤| f/f1|-f/f3≤0.42.
On the other hand, the invention provides a kind of image pick-up lens group, extremely sequentially comprised as side by thing side: a pre-group mirror group, an aperture and one rear group of mirror group; This pre-group mirror group, is extremely sequentially comprised as side by thing side: the first lens of the negative refracting power of a tool, and its thing side is convex surface and is concave surface as side; And the second lens of the positive refracting power of a tool, it is convex surface as side; This rear group's mirror group, is extremely sequentially comprised as side by thing side: the 3rd lens of the positive refracting power of a tool, and its thing side is convex surface; The 4th lens of the negative refracting power of one tool, its thing side is convex surface and is concave surface as side, and in its Ji Xiang side, thing side, at least one surface is aspheric surface, and in its Ji Xiang side, thing side, at least one surface is provided with at least one point of inflexion, and its material is plastic cement; And the 5th lens of the positive refracting power of a tool, in its Ji Xiang side, thing side, at least one surface is aspheric surface, and its material is plastic cement; Wherein, the whole focal length of this image pick-up lens group is f, the focal length of these the second lens is f2, the focal length of the 3rd lens is f3, the radius-of-curvature of the thing side of the 3rd lens is R5, the radius-of-curvature of the thing side of the 4th lens is R7, is to meet following relationship: 0.15 < f/f2 < 1.0; 0.5 < f/f3 < 1.5; And 0 < R5/R7 < 1.2.
When aforementioned image pick-up lens group meets following relationship: when 0.15 < f/f2 < 1.0, can effectively control this second lens refracting power and be unlikely excessive, and contribute to reduce the generation of aberration, and reduce the susceptibility of system; Preferably, be to meet following relationship: 0.30≤f/f2≤0.74.
When aforementioned image pick-up lens group meets following relationship: when 0.5 < f/f3 < 1.5, by the refracting power of adjusting the 3rd lens, can assist update the system aberration, improve image quality; Preferably, be to meet following relationship: 0.57≤f/f3≤1.19.
When aforementioned image pick-up lens group meets following relationship: when 0 < R5/R7 < 1.2, the positive refracting power of the 3rd lens can be strengthened in the convex surface thing side of the 3rd lens, and the convex surface thing side of the 4th lens can coordinate the negative refracting power of the 4th lens with correction aberration; Preferably, be to meet following relationship: 0.06≤R5/R7≤0.75.
In the aforementioned image pick-up lens group of the present invention, the whole focal length of this image pick-up lens group is f, the focal length of this first lens is f1, preferably, when aforementioned image pick-up lens group meets following relationship: when-1.45 the < f/f1 <-0.55, the refracting power of this first lens is comparatively suitable, is avoided susceptibility too high; Preferably, be to meet following relationship :-1.15≤f/f1≤-0.82.
In the aforementioned image pick-up lens group of the present invention, the thickness of this first lens on optical axis is CT1, the thickness of the 5th lens on optical axis is CT5, preferably, when aforementioned image pick-up lens group meets following relationship: when 0.7 < CT1/CT5 < 1.7, the thickness of this first lens and the 5th lens is comparatively applicable, is conducive to promote image quality, and maintains lightening characteristic simultaneously; Preferably, be to meet following relationship: 0.86≤CT1/CT5≤1.55.
In the aforementioned image pick-up lens group of the present invention, the whole focal length of this image pick-up lens group is f, the focal length of this first lens is f1, the focal length of the 3rd lens is f3, preferably, when aforementioned image pick-up lens group meets following relationship: 0 < | when f/f1|-f/f3 < 0.8, can make, under the long situation of system total length, to provide good field angle being unlikely to; Preferably, be to meet following relationship: 0.24≤| f/f1|-f/f3≤0.42.
On the one hand, the invention provides a kind of image pick-up lens group again, extremely sequentially comprised the lens of five tool refracting powers by thing side as side: the first lens of the negative refracting power of a tool, its thing side is convex surface and is concave surface as side; The second lens of the positive refracting power of one tool, it is convex surface as side; The 3rd lens of the positive refracting power of one tool, its thing side is convex surface; The 4th lens of the negative refracting power of one tool, its thing side is convex surface and is concave surface as side, and in its Ji Xiang side, thing side, at least one surface is aspheric surface, and in its Ji Xiang side, thing side, at least one surface is provided with at least one point of inflexion, and its material is plastic cement; And the 5th lens of the positive refracting power of a tool, in its Ji Xiang side, thing side, at least one surface is aspheric surface, and its material is plastic cement; Wherein, the whole focal length of this image pick-up lens group is that the focal length of these the second lens of f is f2, the focal length of the 3rd lens is f3, and the focal length of this first lens is f1, is to meet following relationship: 0.15 < f/f2 < 1.0; 0.5 < f/f3 < 1.5; And 0 < | f/f1|-f/f3 < 0.8.
When aforementioned image pick-up lens group meets following relationship: when 0.15 < f/f2 < 1.0, can effectively control this second lens refracting power and be unlikely excessive, and contribute to reduce the generation of aberration, and reduce the susceptibility of system; Preferably, be to meet following relationship: 0.30≤f/f2≤0.74.
When aforementioned image pick-up lens group meets following relationship: when 0.5 < f/f3 < 1.5, by the refracting power of adjusting the 3rd lens, can assist update the system aberration, improve image quality; Preferably, be to meet following relationship: 0.57≤f/f3≤1.19.
When aforementioned image pick-up lens group meets following relationship: 0 < | when f/f1|-f/f3 < 0.8, can make, under the long situation of system total length, to provide good field angle being unlikely to; Preferably, be to meet following relationship: 0.24≤| f/f1|-f/f3≤0.42.
In the aforementioned image pick-up lens group of the present invention, the radius-of-curvature of the thing side of the 3rd lens is R5, the radius-of-curvature of the thing side of the 4th lens is R7, preferably, when aforementioned image pick-up lens group meets following relationship: when 0 < R5/R7 < 1.2, the positive refracting power of the 3rd lens can be strengthened in the convex surface thing side of the 3rd lens, and the convex surface thing side of the 4th lens can coordinate the negative refracting power of the 4th lens with correction aberration; Preferably, be to meet following relationship: 0.06≤R5/R7≤0.75.
In image pick-up lens group of the present invention, the material of lens can be glass or plastic cement, if the material of lens is glass, can increase the degree of freedom of this image pick-up lens group refracting power configuration, if lens material is plastic cement, can effectively reduce production costs.In addition, aspheric surface can be set on minute surface, aspheric surface can easily be made into the shape beyond sphere, obtain more controlled variable, in order to subdue aberration, and then reduce the number that lens use, therefore can effectively reduce the total length of image pick-up lens group of the present invention.
In image pick-up lens group of the present invention, if lens surface is convex surface, represent that this lens surface is convex surface in paraxial place; If lens surface is concave surface, represent that this lens surface is concave surface in paraxial place.
In image pick-up lens group of the present invention, a diaphragm can be at least set, as credit light diaphragm (Glare Stop) or field stop (Field Stop) etc., to reduce parasitic light, contribute to promote image quality.
Image pick-up lens group of the present invention will coordinate appended graphic detailed description in detail by following specific embodiment.
" the first embodiment "
First embodiment of the invention refers to Figure 1A, and the aberration curve of the first embodiment refers to Figure 1B.The image acquisition lens group of the first embodiment is mainly made up of five lens, is extremely sequentially comprised as side by thing side:
The first lens 110 of the negative refracting power of one tool, its thing side 111 is that convex surface and picture side 112 are concave surface, and its material is plastic cement, and the 111Ji Xiang side, thing side 112 of this first lens 110 is all aspheric surface;
The second lens 120 of the positive refracting power of one tool, its thing side 121 is that concave surface and picture side 122 are convex surface, and its material is plastic cement, and the 121Ji Xiang side, thing side 122 of these the second lens 120 is all aspheric surface;
The 3rd lens 130 of the positive refracting power of one tool, its thing side 131 is that convex surface and picture side 132 are convex surface, and its material is plastic cement, and the 131Ji Xiang side, thing side 132 of the 3rd lens 130 is all aspheric surface;
The 4th lens 140 of the negative refracting power of one tool, its thing side 141 is that convex surface and picture side 142 are concave surface, its material is plastic cement, and the 141Ji Xiang side, thing side 142 of the 4th lens 140 is all aspheric surface, and the thing side 141 of the 4th lens 140 is provided with at least one point of inflexion; And
The 5th lens 150 of the positive refracting power of one tool, its thing side 151 is that convex surface and picture side 152 are convex surface, and its material is plastic cement, and the 151Ji Xiang side, thing side 152 of the 5th lens 150 is all aspheric surface;
Wherein, this image pick-up lens group is separately provided with an aperture 100 and is placed between the second lens 120 and the 3rd lens 130;
Separately include an infrared ray filtering optical filter (IR-filter) 160 and be placed in looking like between side 152 and an imaging surface 171 of the 5th lens 150; The material of this infrared ray filtering optical filter 160 is the focal length that glass and its do not affect this image pick-up lens group of the present invention; Separately be provided with an Image Sensor 170 on this imaging surface 171.
As shown in Table 1, as shown in Table 2, wherein the unit of radius-of-curvature, thickness and focal length is mm to its aspherical surface data to the detailed optical data of the first embodiment, and HFOV is defined as the half at maximum visual angle.
The equation of above-mentioned aspheric curve is expressed as follows:
Wherein:
X: the point that in aspheric surface, distance optical axis is Y, itself and the relative height that is tangential on the tangent plane on summit on aspheric surface optical axis;
Y: the point in aspheric curve and the distance of optical axis;
K: conical surface coefficient;
Ai: i rank asphericity coefficient.
In the image pick-up lens group of the first embodiment, the focal length of overall image pick-up lens group is f, and its relational expression is: f=5.03 (millimeter).
In the image pick-up lens group of the first embodiment, the f-number of overall image pick-up lens group is Fno, and its relational expression is: Fno=2.35.
In the image pick-up lens group of the first embodiment, in overall image pick-up lens group, the half at maximum visual angle is HFOV, and its relational expression is: HFOV=35.8 (degree).
In the image pick-up lens group of the first embodiment, the abbe number of the 3rd lens 130 is V3, and the abbe number of the 4th lens 140 is V4, and its relational expression is: V3-V4=34.5.
In the image pick-up lens group of the first embodiment, the thickness of this first lens 110 on optical axis is CT1, and the thickness of the 5th lens 150 on optical axis is CT5, and its relational expression is: CT1/CT5=0.86.
In the image pick-up lens group of the first embodiment, the whole focal length of this image pick-up lens group is f, the distance of the thing side 131 as side 122 and the 3rd lens 130 of these the second lens 120 on optical axis is T23, is to meet following relationship: (T23/f) * 10=0.12.
In the image pick-up lens group of the first embodiment, the radius-of-curvature of the thing side 131 of the 3rd lens 130 is R5, and the radius-of-curvature of the thing side 141 of the 4th lens 140 is R7, is to meet following relationship: R5/R7=0.38.
In the image pick-up lens group of the first embodiment, the radius-of-curvature of the thing side 141 of the 4th lens 140 is R7, the radius-of-curvature as side 142 of the 4th lens 140 is R8, is to meet following relationship: (R7+R8)/(R7-R8)=1.80.
In the image pick-up lens group of the first embodiment, the whole focal length of this image pick-up lens group is f, and the focal length of this first lens 110 is f1, and its relational expression is: f/f1=-0.82.
In the image pick-up lens group of the first embodiment, the whole focal length of this image pick-up lens group is f, and the focal length of these the second lens 120 is f2, and its relational expression is: f/f2=0.36.
In the image pick-up lens group of the first embodiment, the whole focal length of this image pick-up lens group is f, and the focal length of the 3rd lens 130 is f3, and its relational expression is: f/f3=0.96.
In the image pick-up lens group of the first embodiment, the whole focal length of this image pick-up lens group is f, and the focal length of this first lens 110 is f1, and the focal length of the 3rd lens 130 is f3, and its relational expression is: | f/f1|-f/f3=-0.14.
In the image pick-up lens group of the first embodiment, this aperture 100 is SL to the distance of this imaging surface 171 on optical axis, and the thing side 111 of this first lens 110 is TTL to the distance of this imaging surface 171 on optical axis, and its relational expression is: SL/TTL=0.68.
" the second embodiment "
Second embodiment of the invention refers to Fig. 2 A, and the aberration curve of the second embodiment refers to Fig. 2 B.The image acquisition lens group of the second embodiment is mainly made up of five lens, is extremely sequentially comprised as side by thing side:
The first lens 210 of the negative refracting power of one tool, its thing side 211 is that convex surface and picture side 212 are concave surface, and its material is plastic cement, and the 211Ji Xiang side, thing side 212 of this first lens 210 is all aspheric surface;
The second lens 220 of the positive refracting power of one tool, its thing side 221 is that concave surface and picture side 222 are convex surface, and its material is plastic cement, and the 221Ji Xiang side, thing side 222 of these the second lens 220 is all aspheric surface;
The 3rd lens 230 of the positive refracting power of one tool, its thing side 231 is that convex surface and picture side 232 are convex surface, and its material is plastic cement, and the 231Ji Xiang side, thing side 232 of the 3rd lens 230 is all aspheric surface;
The 4th lens 240 of the negative refracting power of one tool, its thing side 241 is that convex surface and picture side 242 are concave surface, its material is plastic cement, and the 241Ji Xiang side, thing side 242 of the 4th lens 240 is all aspheric surface, and the thing side 241 of the 4th lens 240 is provided with at least one point of inflexion; And
The 5th lens 250 of the positive refracting power of one tool, its thing side 251 is that convex surface and picture side 252 are convex surface, and its material is plastic cement, and the 251Ji Xiang side, thing side 252 of the 5th lens 250 is all aspheric surface;
Wherein, this image pick-up lens group is separately provided with an aperture 200 and is placed between the second lens 220 and the 3rd lens 230;
Separately include an infrared ray filtering optical filter 260 and be placed in looking like between side 252 and an imaging surface 271 of the 5th lens 250; The material of this infrared ray filtering optical filter 260 is the focal length that glass and its do not affect this image pick-up lens group of the present invention; Separately be provided with an Image Sensor 270 on this imaging surface 271.
As shown in Table 3, as shown in Table 4, wherein the unit of radius-of-curvature, thickness and focal length is mm to its aspherical surface data to the detailed optical data of the second embodiment, and HFOV is defined as the half at maximum visual angle.
The equational expression of the second embodiment aspheric curve is as the form of the first embodiment.In addition, the system of parameters of each relational expression is explained as the first embodiment, and only the numerical value of each relational expression is as listed in table five:
" the 3rd embodiment "
Third embodiment of the invention refers to Fig. 3 A, and the aberration curve of the 3rd embodiment refers to Fig. 3 B.The image acquisition lens group of the 3rd embodiment is mainly made up of five lens, is extremely sequentially comprised as side by thing side:
The first lens 310 of the negative refracting power of one tool, its thing side 311 is that convex surface and picture side 312 are concave surface, and its material is plastic cement, and the 311Ji Xiang side, thing side 312 of this first lens 310 is all aspheric surface;
The second lens 320 of the positive refracting power of one tool, its thing side 321 is that convex surface and picture side 322 are convex surface, and its material is plastic cement, and the 321Ji Xiang side, thing side 322 of these the second lens 320 is all aspheric surface;
The 3rd lens 330 of the positive refracting power of one tool, its thing side 331 is that convex surface and picture side 332 are convex surface, and its material is plastic cement, and the 331Ji Xiang side, thing side 332 of the 3rd lens 330 is all aspheric surface;
The 4th lens 340 of the negative refracting power of one tool, its thing side 341 is that convex surface and picture side 342 are concave surface, its material is plastic cement, and the 341Ji Xiang side, thing side 342 of the 4th lens 340 is all aspheric surface, and the thing side 341 of the 4th lens 340 is provided with at least one point of inflexion; And
The 5th lens 350 of the positive refracting power of one tool, its thing side 351 is that convex surface and picture side 352 are convex surface, and its material is plastic cement, and the 351Ji Xiang side, thing side 352 of the 5th lens 350 is all aspheric surface;
Wherein, this image pick-up lens group is separately provided with an aperture 300 and is placed between the second lens 320 and the 3rd lens 330;
Separately include an infrared ray filtering optical filter 360 and be placed in looking like between side 352 and an imaging surface 371 of the 5th lens 350; The material of this infrared ray filtering optical filter 360 is the focal length that glass and its do not affect this image pick-up lens group of the present invention; Separately be provided with an Image Sensor 370 on this imaging surface 371.
As shown in Table 6, as shown in Table 7, wherein the unit of radius-of-curvature, thickness and focal length is mm to its aspherical surface data to the detailed optical data of the 3rd embodiment, and HFOV is defined as the half at maximum visual angle.
The equational expression of the 3rd embodiment aspheric curve is as the form of the first embodiment.In addition, the system of parameters of each relational expression is explained as the first embodiment, and only the numerical value of each relational expression is as listed in table eight:
" the 4th embodiment "
Fourth embodiment of the invention refers to Fig. 4 A, and the aberration curve of the 4th embodiment refers to Fig. 4 B.The image acquisition lens group of the 4th embodiment is mainly made up of five lens, is extremely sequentially comprised as side by thing side:
The first lens 410 of the negative refracting power of one tool, its thing side 411 is that convex surface and picture side 412 are concave surface, and its material is plastic cement, and the 411Ji Xiang side, thing side 412 of this first lens 410 is all aspheric surface;
The second lens 420 of the positive refracting power of one tool, its thing side 421 is that convex surface and picture side 422 are convex surface, and its material is plastic cement, and the 421Ji Xiang side, thing side 422 of these the second lens 420 is all aspheric surface;
The 3rd lens 430 of the positive refracting power of one tool, its thing side 431 is that convex surface and picture side 432 are convex surface, and its material is plastic cement, and the 431Ji Xiang side, thing side 432 of the 3rd lens 430 is all aspheric surface;
The 4th lens 440 of the negative refracting power of one tool, its thing side 441 is that convex surface and picture side 442 are concave surface, its material is plastic cement, and the 441Ji Xiang side, thing side 442 of the 4th lens 440 is all aspheric surface, and the thing side 441 of the 4th lens 440 is provided with at least one point of inflexion; And
The 5th lens 450 of the positive refracting power of one tool, its thing side 451 is that convex surface and picture side 452 are convex surface, and its material is plastic cement, and the 451Ji Xiang side, thing side 452 of the 5th lens 450 is all aspheric surface;
Wherein, this image pick-up lens group is separately provided with an aperture 400 and is placed between the second lens 420 and the 3rd lens 430;
Separately include an infrared ray filtering optical filter 460 and be placed in looking like between side 452 and an imaging surface 471 of the 5th lens 450; The material of this infrared ray filtering optical filter 460 is the focal length that glass and its do not affect this image pick-up lens group of the present invention; Separately be provided with an Image Sensor 470 on this imaging surface 471.
As shown in Table 9, as shown in Table 10, wherein the unit of radius-of-curvature, thickness and focal length is mm to its aspherical surface data to the detailed optical data of the 4th embodiment, and HFOV is defined as the half at maximum visual angle.
The equational expression of the 4th embodiment aspheric curve is as the form of the first embodiment.In addition, the system of parameters of each relational expression is explained as the first embodiment, and only the numerical value of each relational expression is as listed in table ten one:
" the 5th embodiment "
Fifth embodiment of the invention refers to Fig. 5 A, and the aberration curve of the 5th embodiment refers to Fig. 5 B.The image acquisition lens group of the 5th embodiment is mainly made up of five lens, is extremely sequentially comprised as side by thing side:
The first lens 510 of the negative refracting power of one tool, its thing side 511 is that convex surface and picture side 512 are concave surface, and its material is plastic cement, and the 511Ji Xiang side, thing side 512 of this first lens 510 is all aspheric surface;
The second lens 520 of the positive refracting power of one tool, its thing side 521 is that convex surface and picture side 522 are convex surface, and its material is plastic cement, and the 521Ji Xiang side, thing side 522 of these the second lens 520 is all aspheric surface;
The 3rd lens 530 of the positive refracting power of one tool, its thing side 531 is that convex surface and picture side 532 are concave surface, and its material is plastic cement, and the 531Ji Xiang side, thing side 532 of the 3rd lens 530 is all aspheric surface;
The 4th lens 540 of the negative refracting power of one tool, its thing side 541 is that convex surface and picture side 542 are concave surface, its material is plastic cement, and the 541Ji Xiang side, thing side 542 of the 4th lens 540 is all aspheric surface, and the thing side 541 of the 4th lens 540 is provided with at least one point of inflexion; And
The 5th lens 550 of the positive refracting power of one tool, its thing side 551 is that convex surface and picture side 552 are convex surface, and its material is plastic cement, and the 551Ji Xiang side, thing side 552 of the 5th lens 550 is all aspheric surface;
Wherein, this image pick-up lens group is separately provided with an aperture 500 and is placed between the second lens 520 and the 3rd lens 530;
Separately include an infrared ray filtering optical filter 560 and be placed in looking like between side 552 and an imaging surface 571 of the 5th lens 550; The material of this infrared ray filtering optical filter 560 is the focal length that glass and its do not affect this image pick-up lens group of the present invention; Separately be provided with an Image Sensor 570 on this imaging surface 571.
The detailed optical data of the 5th embodiment is as shown in table ten two, and its aspherical surface data is as shown in table ten three, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as the half at maximum visual angle.
The equational expression of the 5th embodiment aspheric curve is as the form of the first embodiment.In addition, the system of parameters of each relational expression is explained as the first embodiment, and only the numerical value of each relational expression is as listed in table ten four:
" the 6th embodiment "
Sixth embodiment of the invention refers to Fig. 6 A, and the aberration curve of the 6th embodiment refers to Fig. 6 B.The image acquisition lens group of the 6th embodiment is mainly made up of five lens, is extremely sequentially comprised as side by thing side:
The first lens 610 of the negative refracting power of one tool, its thing side 611 is that convex surface and picture side 612 are concave surface, and its material is plastic cement, and the 611Ji Xiang side, thing side 612 of this first lens 610 is all aspheric surface;
The second lens 620 of the positive refracting power of one tool, its thing side 621 is that concave surface and picture side 622 are convex surface, and its material is plastic cement, and the 621Ji Xiang side, thing side 622 of these the second lens 620 is all aspheric surface;
The 3rd lens 630 of the positive refracting power of one tool, its thing side 631 is that convex surface and picture side 632 are convex surface, and its material is plastic cement, and the 631Ji Xiang side, thing side 632 of the 3rd lens 630 is all aspheric surface;
The 4th lens 640 of the negative refracting power of one tool, its thing side 641 is that convex surface and picture side 642 are concave surface, its material is plastic cement, and the 641Ji Xiang side, thing side 642 of the 4th lens 640 is all aspheric surface, and the thing side 641 of the 4th lens 640 is provided with at least one point of inflexion; And
The 5th lens 650 of the positive refracting power of one tool, its thing side 651 is that convex surface and picture side 652 are convex surface, and its material is plastic cement, and the 651Ji Xiang side, thing side 652 of the 5th lens 650 is all aspheric surface;
Wherein, this image pick-up lens group is separately provided with an aperture 600 and is placed between the second lens 620 and the 3rd lens 630;
Separately include an infrared ray filtering optical filter 660 and be placed in looking like between side 652 and an imaging surface 671 of the 5th lens 650; The material of this infrared ray filtering optical filter 660 is the focal length that glass and its do not affect this image pick-up lens group of the present invention; Separately be provided with an Image Sensor 670 on this imaging surface 671.
The detailed optical data of the 6th embodiment is as shown in table ten five, and its aspherical surface data is as shown in table ten six, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as the half at maximum visual angle.
The equational expression of the 6th embodiment aspheric curve is as the form of the first embodiment.In addition, the system of parameters of each relational expression is explained as the first embodiment, and only the numerical value of each relational expression is as listed in table ten seven:
" the 7th embodiment "
Seventh embodiment of the invention refers to Fig. 7 A, and the aberration curve of the 7th embodiment refers to Fig. 7 B.The image acquisition lens group of the 7th embodiment is mainly made up of five lens, is extremely sequentially comprised as side by thing side:
The first lens 710 of the negative refracting power of one tool, its thing side 711 is that convex surface and picture side 712 are concave surface, and its material is plastic cement, and the 711Ji Xiang side, thing side 712 of this first lens 710 is all aspheric surface;
The second lens 720 of the positive refracting power of one tool, its thing side 721 is that concave surface and picture side 722 are convex surface, and its material is plastic cement, and the 721Ji Xiang side, thing side 722 of these the second lens 720 is all aspheric surface;
The 3rd lens 730 of the positive refracting power of one tool, its thing side 731 is that convex surface and picture side 732 are convex surface, and its material is glass, and the 731Ji Xiang side, thing side 732 of the 3rd lens 730 is all aspheric surface;
The 4th lens 740 of the negative refracting power of one tool, its thing side 741 is that convex surface and picture side 742 are concave surface, its material is plastic cement, and the 741Ji Xiang side, thing side 742 of the 4th lens 740 is all aspheric surface, and the thing side 741 of the 4th lens 740 is provided with at least one point of inflexion; And
The 5th lens 750 of the positive refracting power of one tool, its thing side 751 is that convex surface and picture side 752 are convex surface, and its material is plastic cement, and the 751Ji Xiang side, thing side 752 of the 5th lens 750 is all aspheric surface;
Wherein, this image pick-up lens group is separately provided with an aperture 700 and is placed between the second lens 720 and the 3rd lens 730;
Separately include an infrared ray filtering optical filter 760 and be placed in looking like between side 752 and an imaging surface 771 of the 5th lens 750; The material of this infrared ray filtering optical filter 760 is the focal length that glass and its do not affect this image pick-up lens group of the present invention; Separately be provided with an Image Sensor 770 on this imaging surface 771.
The detailed optical data of the 7th embodiment is as shown in table ten eight, and its aspherical surface data is as shown in table ten nine, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as the half at maximum visual angle.
The equational expression of the 7th embodiment aspheric curve is as the form of the first embodiment.In addition, the system of parameters of each relational expression is explained as the first embodiment, and only the numerical value of each relational expression is as listed in table two ten:
" the 8th embodiment "
Eighth embodiment of the invention refers to Fig. 8 A, and the aberration curve of the 8th embodiment refers to Fig. 8 B.The image acquisition lens group of the 8th embodiment is mainly made up of five lens, is extremely sequentially comprised as side by thing side:
The first lens 810 of the negative refracting power of one tool, its thing side 811 is that convex surface and picture side 812 are concave surface, and its material is plastic cement, and the 811Ji Xiang side, thing side 812 of this first lens 810 is all aspheric surface;
The second lens 820 of the positive refracting power of one tool, its thing side 821 is that concave surface and picture side 822 are convex surface, and its material is plastic cement, and the 821Ji Xiang side, thing side 822 of these the second lens 820 is all aspheric surface;
The 3rd lens 830 of the positive refracting power of one tool, its thing side 831 is that convex surface and picture side 832 are convex surface, and its material is glass, and the 831Ji Xiang side, thing side 832 of the 3rd lens 830 is all aspheric surface;
The 4th lens 840 of the negative refracting power of one tool, its thing side 841 is that convex surface and picture side 842 are concave surface, its material is plastic cement, and the 841Ji Xiang side, thing side 842 of the 4th lens 840 is all aspheric surface, and the thing side 841 of the 4th lens 840 is provided with at least one point of inflexion; And
The 5th lens 850 of the positive refracting power of one tool, its thing side 851 is that concave surface and picture side 852 are convex surface, and its material is plastic cement, and the 851Ji Xiang side, thing side 852 of the 5th lens 850 is all aspheric surface;
Wherein, this image pick-up lens group is separately provided with an aperture 800 and is placed between the second lens 820 and the 3rd lens 830;
Separately include an infrared ray filtering optical filter 860 and be placed in looking like between side 852 and an imaging surface 871 of the 5th lens 850; The material of this infrared ray filtering optical filter 860 is the focal length that glass and its do not affect this image pick-up lens group of the present invention; Separately be provided with an Image Sensor 870 on this imaging surface 871.
The detailed optical data of the 8th embodiment is as shown in table two 11, and its aspherical surface data is as shown in table two 12, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as the half at maximum visual angle.
The equational expression of the 8th embodiment aspheric curve is as the form of the first embodiment.In addition, the system of parameters of each relational expression is explained as the first embodiment, and only the numerical value of each relational expression is as listed in table two 13:
" the 9th embodiment "
Ninth embodiment of the invention refers to Fig. 9 A, and the aberration curve of the 9th embodiment refers to Fig. 9 B.The image acquisition lens group of the 9th embodiment is mainly made up of five lens, is extremely sequentially comprised as side by thing side:
The first lens 910 of the negative refracting power of one tool, its thing side 911 is that convex surface and picture side 912 are concave surface, and its material is plastic cement, and the 911Ji Xiang side, thing side 912 of this first lens 910 is all aspheric surface;
The second lens 920 of the positive refracting power of one tool, its thing side 921 is that convex surface and picture side 922 are convex surface, and its material is plastic cement, and the 921Ji Xiang side, thing side 922 of these the second lens 920 is all aspheric surface;
The 3rd lens 930 of the positive refracting power of one tool, its thing side 931 is that convex surface and picture side 932 are convex surface, and its material is plastic cement, and the 931Ji Xiang side, thing side 932 of the 3rd lens 930 is all aspheric surface;
The 4th lens 940 of the negative refracting power of one tool, its thing side 941 is that convex surface and picture side 942 are concave surface, its material is plastic cement, and the 941Ji Xiang side, thing side 942 of the 4th lens 940 is all aspheric surface, and the thing side 941 of the 4th lens 940 is provided with at least one point of inflexion; And
The 5th lens 950 of the positive refracting power of one tool, its thing side 951 is that convex surface and picture side 952 are concave surface, and its material is plastic cement, and the 951Ji Xiang side, thing side 952 of the 5th lens 950 is all aspheric surface;
Wherein, this image pick-up lens group is separately provided with an aperture 900 and is placed between the second lens 920 and the 3rd lens 930;
Separately include an infrared ray filtering optical filter 960 and be placed in looking like between side 952 and an imaging surface 971 of the 5th lens 950; The material of this infrared ray filtering optical filter 960 is the focal length that glass and its do not affect this image pick-up lens group of the present invention; Separately be provided with an Image Sensor 970 on this imaging surface 971.
The detailed optical data of the 9th embodiment is as shown in table two 14, and its aspherical surface data is as shown in table two 15, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as the half at maximum visual angle.
The equational expression of the 9th embodiment aspheric curve is as the form of the first embodiment.In addition, the system of parameters of each relational expression is explained as the first embodiment, and only the numerical value of each relational expression is as listed in table two 16:
Table one to table two 16 is depicted as the different numerical value change tables of image pick-up lens group embodiment of the present invention; so all true gained of testing of numerical value change of each embodiment of the present invention; even if use different numerical value; the product of same structure must belong to protection category of the present invention; therefore above explanation is described and graphic only as exemplary, non-in order to limit claim protection domain of the present invention.
Claims (19)
1. an image pick-up lens group, is characterized in that, described image pick-up lens group is extremely sequentially comprised the lens of five tool refracting powers as side by thing side:
The first lens of the negative refracting power of one tool, its thing side is convex surface and is concave surface as side;
The second lens of the positive refracting power of one tool, it is convex surface as side;
The 3rd lens of the positive refracting power of one tool, its thing side is convex surface;
The 4th lens of the negative refracting power of one tool, its thing side is convex surface and is concave surface as side, and in the Ji Xiang side, thing side of the 4th described lens, at least one surface is provided with at least one point of inflexion; And
The 5th lens of the positive refracting power of one tool;
Wherein, the whole focal length of described image pick-up lens group is f, the focal length of described first lens is f1, the focal length of the second described lens is f2, the focal length of the 3rd described lens is f3, the distance of the thing side as side and described the 3rd lens of the second described lens on optical axis is T23, is to meet following relationship:
-1.45<f/f1<-0.55；
0.15<f/f2<1.0；
0.5<f/f3<1.5; And
0<(T23/f)*10<5.0。
2. image pick-up lens group as claimed in claim 1, is characterized in that, in the Ji Xiang side, thing side of the 4th described lens, at least one surface is aspheric surface, and its material is plastic cement; In the Ji Xiang side, thing side of the 5th described lens, at least one surface is aspheric surface, and its material is plastic cement.
3. image pick-up lens group as claimed in claim 2, it is characterized in that, the distance of the thing side as side and described the 3rd lens of the second described lens on optical axis is T23, and the whole focal length of described image pick-up lens group is f, is to meet following relationship:
0<(T23/f)*10<1.5。
4. image pick-up lens group as claimed in claim 2, it is characterized in that, described image pick-up lens group further arranges an aperture, the distance of described aperture to imaging surface on optical axis is SL, the thing side of described first lens to the distance of described imaging surface on optical axis is TTL, is to meet following relationship:
0.5<SL/TTL<0.85。
5. image pick-up lens group as claimed in claim 3, is characterized in that, the radius-of-curvature of the thing side of the 3rd described lens is R5, and the radius-of-curvature of the thing side of the 4th described lens is R7, is to meet following relationship:
0<R5/R7<1.2。
6. image pick-up lens group as claimed in claim 3, is characterized in that, the whole focal length of described image pick-up lens group is f, and the focal length of described first lens is f1, is to meet following relationship:
-1.25<f/f1<-0.70。
7. image pick-up lens group as claimed in claim 3, is characterized in that, the material of the 3rd described lens is glass.
8. image pick-up lens group as claimed in claim 3, is characterized in that, the radius-of-curvature of the thing side of the 4th described lens is R7, and the radius-of-curvature as side of the 4th described lens is R8, is to meet following relationship:
1.0<(R7+R8)/(R7–R8)<3.0。
9. image pick-up lens group as claimed in claim 8, is characterized in that, the thickness of described first lens on optical axis is CT1, and the described thickness of the 5th lens on optical axis is CT5, is to meet following relationship:
0.7<CT1/CT5<1.7。
10. image pick-up lens group as claimed in claim 8, is characterized in that, the abbe number of the 3rd described lens is V3, and the abbe number of the 4th described lens is V4, is to meet following relationship:
26<V3–V4<45。
11. image pick-up lens groups as claimed in claim 8, it is characterized in that, the distance of the thing side as side and described the 3rd lens of the second described lens on optical axis is T23, and the whole focal length of described image pick-up lens group is f, is to meet following relationship:
0<(T23/f)*10<0.5。
12. image pick-up lens groups as claimed in claim 1, is characterized in that, the whole focal length of described image pick-up lens group is f, and the focal length of described first lens is f1, and the focal length of the 3rd described lens is f3, is to meet following relationship:
0<|f/f1|–f/f3<0.8。
13. 1 kinds of image pick-up lens groups, is characterized in that, described image pick-up lens group is extremely sequentially comprised as side by thing side: a pre-group mirror group, an aperture and one rear group of mirror group;
Described pre-group mirror group, is extremely sequentially comprised as side by thing side:
The first lens of the negative refracting power of one tool, its thing side is convex surface and is concave surface as side; And
The second lens of the positive refracting power of one tool, it is convex surface as side;
Described rear group's mirror group, is extremely sequentially comprised as side by thing side:
The 3rd lens of the positive refracting power of one tool, its thing side is convex surface;
The 4th lens of the negative refracting power of one tool, its thing side is convex surface and is concave surface as side, and in its Ji Xiang side, thing side, at least one surface is aspheric surface, and in its Ji Xiang side, thing side, at least one surface is provided with at least one point of inflexion, and its material is plastic cement; And
The 5th lens of the positive refracting power of one tool, in its Ji Xiang side, thing side, at least one surface is aspheric surface, and its material is plastic cement;
Wherein, the whole focal length of described image pick-up lens group is f, the focal length of the second described lens is f2, the focal length of the 3rd described lens is f3, the radius-of-curvature of the thing side of the 3rd described lens is R5, the radius-of-curvature of the thing side of the 4th described lens is R7, is to meet following relationship:
0.15<f/f2<1.0；
0.5<f/f3<1.5; And
0<R5/R7<1.2。
14. image pick-up lens groups as claimed in claim 13, is characterized in that, the whole focal length of described image pick-up lens group is f, and the focal length of described first lens is f1, is to meet following relationship:
-1.45<f/f1<-0.55。
15. image pick-up lens group as claimed in claim 13, is characterized in that, the thickness of described first lens on optical axis is CT1, and the described thickness of the 5th lens on optical axis is CT5, is to meet following relationship:
0.7<CT1/CT5<1.7。
16. image pick-up lens groups as claimed in claim 13, is characterized in that, the whole focal length of described image pick-up lens group is f, and the focal length of described first lens is f1, and the focal length of the 3rd described lens is f3, is to meet following relationship:
0<|f/f1|–f/f3<0.8。
17. image pick-up lens groups as claimed in claim 13, is characterized in that, in the Ji Xiang side, thing side of the second described lens, at least one surface is aspheric surface, and its material is plastic cement.
18. 1 kinds of image pick-up lens groups, is characterized in that, described image pick-up lens group is extremely sequentially comprised the lens of five tool refracting powers as side by thing side:
The first lens of the negative refracting power of one tool, its thing side is convex surface and is concave surface as side;
The second lens of the positive refracting power of one tool, it is convex surface as side;
The 3rd lens of the positive refracting power of one tool, its thing side is convex surface;
The 4th lens of the negative refracting power of one tool, its thing side is convex surface and is concave surface as side, and in its Ji Xiang side, thing side, at least one surface is aspheric surface, and in its Ji Xiang side, thing side, at least one surface is provided with at least one point of inflexion, and its material is plastic cement; And
The 5th lens of the positive refracting power of one tool, in its Ji Xiang side, thing side, at least one surface is aspheric surface, and its material is plastic cement;
Wherein, the whole focal length of described image pick-up lens group is f, and the focal length of the second described lens is f2, and the focal length of the 3rd described lens is f3, and the focal length of described first lens is f1, is to meet following relationship:
0.15<f/f2<1.0；
0.5<f/f3<1.5; And
0<|f/f1|–f/f3<0.8。
19. image pick-up lens group as claimed in claim 18, is characterized in that, the radius-of-curvature of the thing side of the 3rd described lens is R5, and the radius-of-curvature of the thing side of the 4th described lens is R7, is to meet following relationship:
0<R5/R7<1.2。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW100116509 | 2011-05-11 | ||
| TW100116509A TWI429980B (en) | 2011-05-11 | 2011-05-11 | Image capturing lens assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102778743A CN102778743A (en) | 2012-11-14 |
| CN102778743B true CN102778743B (en) | 2014-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201120284394.XU Expired - Lifetime CN202149967U (en) | 2011-05-11 | 2011-08-05 | Image capturing lens assembly |
| CN201110224310.8A Active CN102778743B (en) | 2011-05-11 | 2011-08-05 | Image capturing lens assembly |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120284394.XU Expired - Lifetime CN202149967U (en) | 2011-05-11 | 2011-08-05 | Image capturing lens assembly |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US8576497B2 (en) |
| CN (2) | CN202149967U (en) |
| TW (1) | TWI429980B (en) |
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| TWI429980B (en) * | 2011-05-11 | 2014-03-11 | Largan Precision Co Ltd | Image capturing lens assembly |
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| JP6584301B2 (en) * | 2015-11-09 | 2019-10-02 | 株式会社タムロン | Optical system and imaging apparatus |
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| CN107024759B (en) * | 2017-06-13 | 2022-07-26 | 浙江舜宇光学有限公司 | Camera lens |
| US10564396B2 (en) | 2017-06-21 | 2020-02-18 | Newmax Technology Co., Ltd. | Five-piece optical lens system with a wide field of view |
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| US10175461B1 (en) | 2017-07-04 | 2019-01-08 | Newmax Technology Co., Ltd. | Six-piece optical lens system with a wide field of view |
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| JP7285091B2 (en) * | 2019-02-27 | 2023-06-01 | 株式会社タムロン | Imaging optical system and imaging device |
| US10976524B2 (en) | 2019-05-30 | 2021-04-13 | Newmax Technology Co., Ltd. | Five-piece optical lens system with a wide field of view |
| JP6840216B2 (en) * | 2019-12-13 | 2021-03-10 | 株式会社タムロン | Optical system and imaging device |
| CN110908092B (en) * | 2019-12-30 | 2021-11-26 | 深圳市特莱斯光学有限公司 | Lens with super-large target surface and no distortion |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20120287515A1 (en) | 2012-11-15 |
| TW201245799A (en) | 2012-11-16 |
| CN202149967U (en) | 2012-02-22 |
| TWI429980B (en) | 2014-03-11 |
| US8576497B2 (en) | 2013-11-05 |
| CN102778743A (en) | 2012-11-14 |
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